doc: Reorganise images and update links

Change-Id: I679d1499376a524bef1cfc33df995b0a719b5ac8
Signed-off-by: Paul Beesley <paul.beesley@arm.com>
diff --git a/docs/design/reset-design.rst b/docs/design/reset-design.rst
index c38f627..b5c9bb4 100644
--- a/docs/design/reset-design.rst
+++ b/docs/design/reset-design.rst
@@ -154,7 +154,7 @@
 .. _Firmware Design: firmware-design.rst
 .. _User Guide: ../getting_started/user-guide.rst
 
-.. |Default reset code flow| image:: ../diagrams/default_reset_code.png?raw=true
-.. |Reset code flow with programmable reset address| image:: ../diagrams/reset_code_no_boot_type_check.png?raw=true
-.. |Reset code flow with single CPU released out of reset| image:: ../diagrams/reset_code_no_cpu_check.png?raw=true
-.. |Reset code flow with programmable reset address and single CPU released out of reset| image:: ../diagrams/reset_code_no_checks.png?raw=true
+.. |Default reset code flow| image:: ../resources/diagrams/default_reset_code.png
+.. |Reset code flow with programmable reset address| image:: ../resources/diagrams/reset_code_no_boot_type_check.png
+.. |Reset code flow with single CPU released out of reset| image:: ../resources/diagrams/reset_code_no_cpu_check.png
+.. |Reset code flow with programmable reset address and single CPU released out of reset| image:: ../resources/diagrams/reset_code_no_checks.png